# Posts by ellie

Total # Posts: 344

**Math Calc**

A factory produces bicycles at a rate of 100+0.4t2−0.7t bicycles per week (t in weeks). How many bicycles were produced from day 15 to 28? Hint: the lower limit of integration should be the integer number of weeks preceding day 15, i.e. a=2, and the final answer should ...

**writing skills**

2. Because information listed on a website can change from day to day, _______ must be included in the end citation on the Works Cited page.A. the title of the siteB. the publication dateC. the date of accessD. the URLStudent Answer: B&...

**Art**

Tona Malo is 3/3 100% correct. Thank you I was reviewing and this helped.

**english**

Did you hear the good news? No, I haven't. I got a promotion at my hob Did you really? well congratulations Im so happy for you Really? yes, good for you do you think so? yes you really deserved this thank you

**Math**

9*3.14*1.2=33.912

**Astronomy**

Imagine that the asteroid A that has an escape velocity of 50m/s. If asteroid B has twice the mass and twice the radius it would have an escape velocity _______ the escape velocity of asteroid A

**ART**

That Girl is 100% 4/4 correct! Thank you!

**Chemistry**

If 22 mol of benzene are completely reacted with molecular oxygen, how many moles of carbon dioxide will be produced?

**college chemistry**

calculate the average kinetic energies of CH4 and N2 molecules at 273k and 546k

**Math**

Points P and Q are tries toom points on segment AB. If AQ =7x+6 and PQ= 3x+5, find all possible values for the length of AB. So far I've established that 4x+1 is the length of AP and QB So the total length of AB should be 11x+7 I think, I'm not sure how to solve and ...

**CHEMISTRY-URGENT**

Thank you very much!!

**CHEMISTRY-URGENT**

A 4.43 gram sample of phosphorus was burned in air to produce 10.15 g of an oxide. What's the empirical formula of this compound?

**language arts**

Well for question 3 if we take the word nonchalant, what does it mean? Then go from there.

**physics**

There are 4 significant figures.

**chemistry-URGENT**

how many moles of atoms are contained in 7.654 x 10^32 atoms of Ga ? Thank you!

**Chemistry**

How many moles of atoms are contained in 5.60 grams of Sulfur? Can someone help me understand how to work out other problems like these as well? Thank you!!

**Math**

Larry and Gary are discussing whose garden has the most area to plant flowers. Larry claims that all they have to do is walk around the two gardens to get the perimeter and the one with the greatest perimeter has the greatest area. How would you help these students?

**3 grade math**

How can I find the area of an angle?" How do you respond?

**physics**

Jordan throws a golfball straight up from the top of a building 50 meters high. The initial speed of the golfball is 20 m/s and it just misses the edge of the roof when it eventually falls. Neglecting air resistance, find the velocity of the golfball just at the instant it ...

**Chemistry URGENT!!**

Which anions have the largest and smallest radii? Thank you!!

**Chemistry**

Which positive ion (cation) has the smallest radius? Please help! Thanks!

**Math**

For how many values of n where n is a positive integer less than 10 is n+1/2 an integer? A) None B) One C) Three D) Four E) Five Please I would like some help explaining how to get the answer :)

**CHEMISTRY**

Hi! I know I asked this before, but I still don't understand how to solve the problem:"Since a hydrogen atom consists of one proton and one electron, it should have a mass of 1.763 x 10^-24 grams. Using unit factoring, calculate how may hydrogen atoms you'd have ...

**math**

54 seconds

**Chemistry**

could you clarify what you mean by this answer? I was confused. Thank you! :)

**Chemistry**

Since a hydrogen atom consists of one proton and one electron, it should have a mass of 1.763 x 10^-24 grams. Using unit factoring, calculate how may hydrogen atoms you'd have if you had 5.6 g of hydrogen. Thank you!

**english**

You should either put a period after the word purchase and make two separate sentences, or you should make the statement read, "While at home, I regretted the expensive purchase, so I vowed to return one of the sweaters." Hope this helps! :)

**math**

You would pay one dollar in sales tax. You can find this out by multiplying 16 times 1/16, thus finding 1/16 OF 16 dollars.

**Chemistry**

A metal bar having a mass of 212 g is heated to 125.0°C and then dropped into 375 g of water at 24°C. After a while the temperature of the water and the metal is 34.2°C. If the specific heat of the metal is 0.831 J/g°C, how much heat did the metal lose? Please ...

**Chemistry**

Thank you so much!!

**science**

Cuz i'm cool is right with everything except 1 is C. Thank you I needed to check over my answers and you helped a bunch!

**Grammar: PLEASE HELP**

What's the difference among a simple sentence, complex, compound, and compound-complex. I always have a difficult time knowing which is which, except simple sentence of course, that one is easy

**chemistry**

Can CoBr2+ NH4Br + NH4OH ---> Co^2+ (aq) + 2NH3 (l) + H^+ (aq) + H2O (l) + 3Br^- form the complex [Co(NH3)5Br]Br2 if so please explain

**CORE MATHS**

The first two terms in the expansion of (1+ax/2)^10 + (1+bx)^10 in ascending powers of x., are 2 and 90x^2 Given that a is less than b find the values of the constants a and b . (11 marks) Thanks :)

**Algebra**

If you add them this is what you get: 3.1x^2+6x+0.3 4.2x2-5.2x+1 ---------------------- 7.3x^2+0.8x+1.3

**algebra**

Damon and Connections Academy are 4/4 100% correct!Thank you I was reviewing.

**algebra**

Cuz im cool, that is so true!

**English**

Hello, what is a common theme between the Shakespeare's Romeo and Juliet, To Kill a Mockingbird, and Roahl Dahl's Lamb to the Slaughter? Please give examples of the the theme found within in the 3 books. It's just that I have to write a formal literary essay ...

**chemistry**

Complete the following fission reaction 1n0 + 235U92 → 131Sn50 + ? + 2 1n0 + energy

**chemistry**

Complete the following fission reaction 1n0 + 235U92 → 131Sn50 + ? + 2 1n0 + energy

**chemistry**

Hello ellie again. I am still having trouble understanding bombardment. The question I'm working on says Complete the bombardment reaction ? + 40-18Ar → 43-19K + 1-1H

**chemistry**

Hello this is ellie again. I was wondering could you explain what a bombardment reaction is and and show an example of it? Thanks

**chemistry**

I am having trouble understanding what the concept is for writing these out. Write a balanced nuclear equation for the alpha decay of each of the following radioactive isotopes: curium-243, 22589Ac

**chemistry**

hello this is ellie again. I need help on this one problem A solution of 0.314M KOH is used to neutralize 10.0mL H3PO4 solution. H3PO4(aq) + 3KOH(aq) → K3PO4(aq) + 3H2O(l) If 29.3mL KOH solution is required to reach the endpoint, what is the molarity of the H3PO4 ...

**chemistry**

A solution of 0.314M KOH is used to neutralize 10.0mL H3PO4 solution. H3PO4(aq) + 3KOH(aq) → K3PO4(aq) + 3H2O(lIf 29.3mL KOH solution is required to reach the endpoint, what is the molarity of the H3PO4 solution?)

**chemistry**

A solution of 0.314M KOH is used to neutralize 10.0mL H3PO4 solution. H3PO4(aq) + 3KOH(aq) → K3PO4(aq) + 3H2O(l) If 29.3mL KOH solution is required to reach the endpoint, what is the molarity of the H3PO4 solution?

**chemistry**

A solution of 0.314M KOH is used to neutralize 10.0mL H3PO4 solution. H3PO4(aq) + 3KOH(aq) → K3PO4(aq) + 3H2O(l) If 29.3mL KOH solution is required to reach the endpoint, what is the molarity of the H3PO4 solution?

**chemistry**

I have a balance equation but i need to know how to find the different states of each element. How do I do that? Ca + 2 HNO3 => Ca(NO3)2 + H2

**math/ algebra 1**

ok thank you :D

**math/ algebra 1**

right

**math/ algebra 1**

x>15

**math/ algebra 1**

can someone please help me explain how they got this answer and can someone please show me the steps into solving this question? Q: Four more than the quotient of a number and three is at least nine.

**chemistry**

hello i am having trouble writing these two ionic equations. could someone explain to me how to do that? 1.)K2SO4(aq) and Na2CO3(aq).Write the ionic equation. 2.)RbCl(aq) and KOH(aq).Write the ionic equation.

**chemistry**

When I solved the equation I got 3.1 grams of NO2. That isn't the correct answer. What did I do wrong?

**chemistry**

In the formation of smog, nitrogen and oxygen gas react to form nitrogen dioxide: N2(g)+2O2(g)→2NO2(g)How many grams of NO2 will be produced when 2.1L of nitrogen at 840mmHg and 28∘C are completely reacted? I know that you use the equation n=PV/RT to get the number...

**Chemistry**

How are we suppose to solve for the molar mass because we don't have the chemical formula for the gas?

**chemistry**

thanks for your help

**chemistry**

When I've done the equation I've gotten 713.971 K for the first part. What have I done wrong?

**chemistry**

A 0.286g sample of carbon dioxide, CO2, has a volume of 585mL and a pressure of 495mmHg . What is the temperature, in kelvins and degrees Celsius, of the gas?

**Science**

I need help with this...

**Math**

The temperature at 6,000 m altitude is 11 degrees Celsius. At 4,000 m, the temperature is at 2 degrees Celsius. How much colder is it at 6,000 m than at 4,000 m? What is the difference in temperature?

**science**

An insect inside a bus flies from the back toward the front at 2 m/a. The bus is moving in a straight line at 2m/a. What is the speed of the insect?

**maths**

the equation for the motion of an object with constant acceleration is d=vt+0.5at^2where d is the distance travelled in ft, v is the starting velocity in ft/s a is the acceleration in ft/s^2 and t is time in seconds a race car begins with a velocity of 200ft/s and accelerates ...

**Biology**

Trust me this is Biology not Chemistry. In Biology it's the lesson The Building Blocks of Life. Thank you guys I wanted to review my answers.

**human services**

• Can we have client advocacy, a forum for conflict resolution, and agents for policy change without competing for limited dollars and resources? Why? What do you see as the most vital function?

**math**

Thank you!!!

**math**

a fair coin is tossed in the air 4 times. if the coin lands heads up the first three tosses, what is the probability the coin will land heads up the fourth toss? I think it is 1/2 because the coin has 2 sides and 50% it will land on heads. My friend thinks it is 1/16, since ...

**math**

Which two rectangles have an area of 72 square centimeters? A. length 12 cm, width 6 cm B. length 20 cm, width 16 cm C. length 9 cm, width 8 cm D. length 8 cm, width 7 cm

**Physics**

((.2)^2)/(4(pi^2))=.0010132118 .0010132118x9.8 0.00992948m

**math**

ok thank you for explaining that.

**math**

Tina solved for the decimal value 0f (3/5*18) and got an answer of 5.4. Four of her classmates argued that her answer was not reasonable. Which of the following statements best explain why that value can not =5.4 A. the number 18 is a multiple of 3 , so the answer must be a ...

**math**

Thank you, I wasn't thinking the distance, I was thinking the actual numbers of -4 and 5, you helped me see how this is done. Thanks a lot

**math**

a number line below -5 -4 -3 -2 -1 0 1 2 3 4 5 Which of the expressions below represent the distance between -4 and 5 on the number line? [ ]= absolute value symbol A. [-4+5] B.[4-5] C.[-4-5] d.[-5-(-4)] I believe it is D, since the absolute value of a neg. number is positive...

**math- please help**

Thank you so much for your help.

**math- please help**

How do you figure this out? I don't know how to do it? Can you please explain how you would get b? Did you just divide each side by m? Thank you for your help

**math- please help**

This helped alittle but the answers were multiple choice a. c B. 60 C. m D .m/c That is why I thought the best answer was c. = m Is this correct?

**math- please help**

a copy machine makes c copies in m minutes according to the equation c=60m. what is the unit rate of copies per minute? I think it is m but not sure, can you help me understand how to figure out this equation. Please help! Thanks

**math**

a copy machine makes c copies in m minutes according to the equation c=60m. what is the unit rate of copies per minute? I think it is m but not sure, can you help me understand how to figure out this equation. Thanks

**Math**

a park is 3/4 mile long and 1/2mile wide. Which fraction represents the ratio of the parks length to its width? I did it by 3/4 divided by 1/2 this equals 1 1/2 or 3/2 Is this correct?

**Math**

I see what you did, but I thought TT was always done last, so I added and then multiplied TT. Is there an order of operation for Pi?

**Math**

1st I added 16 plus 64=80. Then I multiplied 80 by TT and got 251.3 The last part should be 251.3 I messed up on the last number. so is 251.3 correct? Thank you for checking my work, I appreciate it.

**Math**

The heart shaped card is made by placing a square card and two semicircles together. What is the area of the card. each side of the sqare is 8cm long. I did a=TTr(squared)+lw A=TT4squared+8(8) A=TT16+64 A=80TT A+251.3274123 A=251.3 cm(squared) The total area of the card is 257...

**chemistry**

The solid oxide of generic metal M is added to 75 mL of water and reacts to produce a basic solution that is 0.20 M in the resulting compound. Neutralization of the solution required titration with 27 mL of 0.56 M HCl. How many valence electrons must M have?

**Algebra**

Meh is 6/6 100% correct! Thank you I was reviewing.

**Chemistry. Please help!**

Fe3+ + I1- ¨ Fe2+ + I2 1. Balance the equation 2. Which element is being oxidized? 3. Which element is the reducing agent?

**Physics**

If a pendulum-driven clock gains 5.00 s/day, what fractional change in pendulum length must be made for it to keep perfect time? Please provide explanations and solutions. Thanks in advance :D

**Physics**

At what rate will a pendulum clock run on the Moon, where the acceleration due to gravity is 1.63 m/s2 , if it keeps time accurately on Earth? That is, find the time (in hours) it takes the clock’s hour hand to make one revolution on the Moon. provide solutions and ...

**Physics**

A 2.0kg block hang from a vertical spring causes it to stretch by 200cm. If the 2.0kg block is replaced by a 0.50kg mass and the spring is stretched and released, what are the frequency and period of the oscillations? Please help and provide solutions and explanations. Thank ...

**Math**

Rae is 100% correct. I just took the test and came here to check my answers and she was there for me. Thanks Rae!

**physics**

110 N

**Math**

during a match, pat kicks a football onto the roof of the stand. The stand and the path of the ball are at righ angles to each other. The path of the ball is given by y=2.5x-x^2÷15 The roof of the stand is given by y=x÷2+48 ÷5, where 18</=x</=40. All...

**Physics**

Im not sure what equations to use other than the equation for potential energy or the equation for work. That is about as far as I have come to solving the problem.

**Physics**

A crane is lifting a 500kg payload straight up at a constant speed of 0.7ms-1. (a)What is the power output of the crane. (ignoring losses)? (b)If it takes the cran2 2 minutes to raise the payload to its final height, how far above the ground is this? (c)If the cable were to ...

**Physics**

During a car crash a 65kg person's head goes from traveling at 50km h-1 to stationary in 0.15s. (a)What is the magnitude of the average net force acting on the head of a person with a 4.5kg head? (b)How does this compare with the weight force acting on the person?

**Physics**

The Earth has a mass of 5.97 x10^24 kg and the Moon has a mass of 7.36 x10^22kg. The average distance between the center of the Earth and the center of the moon is 3.84 x10^8m. (a) How far away would the Moon need to be for the magnitude of the gravitational force acting on it...

**Physics**

An 8g bullet leaves a gun at 700ms-1. (a) what is the maximum height that this bullet could reach (ignoring air resistance)

**Physics**

An 8g bullet leaves a gun at 700ms-1. (a) what is the maximum height that this bullet could reach (ignoring air resistance)

**Physics**

Two 30kg children in a 20 kg cart are stationary at the top of a hill. They start rolling down the 80m tall hill and they are traveling at 30 km h-1 when they reach the bottom. (The cart had brakes!) How much work was done on the cart by friction during its travel down the ...

**health**

I would say sedentary lifestyle, diet, smoking, drinking, genetics are all challenges to over coming health and wellness. To overcome these you must change your habits, your lifestyle, the food that you eat and the amount of exercise that you do. This is a short version but ...

**Math**

What is the value of x when the line crosses the x-axis?